Remove superfluous require_once() functions; add comments
Remove superfluous code as Extensions.php, UserGroups.php, and Namespaces.php were merged onto LocalSettings.php, as well as add a few comments to separate sections.
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Remove superfluous code as Extensions.php, UserGroups.php, and Namespaces.php were merged onto LocalSettings.php, as well as add a few comments to separate sections.